Gear reduction device for cam-shuttle forming jacquard driven by servo motor

Abstract

This utility model discloses a gear reduction device for a servo motor-driven cam-type jacquard forming machine, comprising left and right servo motors, transmission boxes, camshafts, a left reduction input gear and a left conjugate cam respectively disposed on the left camshaft, and a right reduction input gear and a right conjugate cam respectively disposed on the right camshaft. The left transmission box includes a left drive side wall plate, a left transmission box body, and a left box cover. The inner end of the left camshaft is supported on the left drive side wall plate, and its outer end is supported on the left box cover. The right transmission box includes a right drive side wall plate, a right transmission box body, and a right box cover. The inner end of the right camshaft is supported on the right drive side wall plate, and its outer end is supported on the right box cover. The left servo motor is fixed to the left box cover, and its output shaft is provided with a left output gear meshing with the left reduction input gear. The right servo motor is fixed to the right box cover, and its output shaft is provided with a right output gear meshing with the right reduction input gear. The utility model, after adopting the above technical solution, has good dynamic balance and uniform vibration distribution.

Description

Technical Field

[0001] This utility model belongs to the technical field of cam shed forming jacquard machines, specifically relating to a gear reduction device for a servo motor driven cam shed forming jacquard machine. Background Technology

[0002] CN1185496A discloses a shed forming device, its installation process, and a Jakarta-type loom equipped with the device. A single, continuously rotating input shaft is fitted with two pairs of conjugate cams. Each pair of cams consists of two eccentric discs. This single input shaft is positioned on one or the other side of the shed forming device. A second shaft, coaxially connected to the input shaft via a coupling, is driven by the loom's shaft for continuous rotation. It is known in the industry that this shed forming device is powered by the loom's main motor, and the location of the input shaft on either side of the shed forming device is entirely determined by whether it is a right-hand or left-hand loom. Because the single input shaft is coaxially fitted with two pairs of conjugate cams, and an axial gap is required between the outer and inner conjugate cams, the concentric inner swing shaft extends further beyond the wall plate than the outer swing shaft tube, resulting in a significant cantilever state. This allows the double-roller driven swing frame mounted on the concentric inner swing shaft to engage with the outer conjugate cam. For example, CN117845398A provides a power transmission and reduction device for a servo motor direct-drive jacquard machine, showing a servo motor, a cam box and a camshaft. The left side of the cam box is fixed to the middle of the right side of the right wall panel of the jacquard machine. The left end of the camshaft is rotatably supported on the right wall panel of the jacquard machine through a left camshaft support bearing. The middle part of the camshaft is located in the cam box cavity of the cam box. Four cams (i.e., two pairs of conjugate cams) are fixed in the middle of the camshaft. The middle part of the camshaft is rotatably supported on a cam box cover fixed to the right side of the cam box cavity for protecting the right side opening of the cam box cavity through a camshaft middle support bearing. This device also includes a gearbox fixed to the right side of the aforementioned cam box cover. The aforementioned servo motor is horizontally fixed to the upper right side of the gearbox. The motor shaft of the servo motor extends to the left into the gearbox cavity and connects to a motor shaft gear. The right end of the aforementioned camshaft extends into the aforementioned gearbox and is rotatably supported on the lower part of the gearbox via a right camshaft support bearing. A camshaft reduction gear, meshing with the motor shaft gear, is fixed at the right end of the camshaft at a position corresponding to the aforementioned motor shaft gear. Therefore, this device consists of only one servo motor and one motor shaft gear, one cam box, one camshaft, and one camshaft reduction gear. The entire drive and reduction transmission chain is located on the side where the jacquard machine's right wall panel is located. Since the motor shaft gear and camshaft reduction gear are subject to significant impact loads, they are prone to wear. The impact loads are even more pronounced during alternating heavy and variable load operation. Furthermore, the right end of the inner swing shaft also suffers from a cantilever problem, similar to the aforementioned issue, thus requiring improvement. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art by providing a gear reduction device for a servo motor driven cam shed forming jacquard machine.

[0004] Therefore, the present invention provides the following technical solution:

[0005] The gear reduction device of the servo motor driven cam shed forming jacquard machine includes a left servo motor, a left transmission box, a left camshaft, a left reduction input gear and a left conjugate cam respectively disposed on the left camshaft, and a right servo motor, a right transmission box, a right camshaft, a right reduction input gear and a right conjugate cam respectively disposed on the right camshaft. The left transmission box includes a left transmission box body fixed to the left drive side wall plate and a left box cover fixed to the outer port of the left transmission box body. The inner end of the left camshaft is supported on the left drive side wall plate, and its outer end is supported on the left... The right transmission box includes a right transmission box body fixed to the right drive side wall plate and a right box cover fixed to the outer port of the right transmission box body. The inner end of the right camshaft is supported on the right drive side wall plate and the outer end is supported on the right box cover. The left servo motor is fixed to the left box cover and its output shaft, which extends into the left transmission box body, is equipped with a left output gear. The left output gear meshes with the left reduction input gear. The right servo motor is fixed to the right box cover and its output shaft, which extends into the right transmission box body, is equipped with a right output gear. The right output gear meshes with the right reduction input gear.

[0006] The aforementioned left output gear is positioned in front of or behind the left reduction input gear, and the right output gear is positioned in front of or behind the right reduction input gear.

[0007] The aforementioned left transmission housing and left drive side wall panel are integrally formed, as are the right transmission housing and right drive side wall panel. When the left and right output gears are symmetrically arranged, the integrally formed left transmission housing and left drive side wall panel are symmetrically arranged with the integrally formed right transmission housing and right drive side wall panel. When the left and right output gears are staggered, the integrally formed left transmission housing and left drive side wall panel are interchangeable with the integrally formed right transmission housing and right drive side wall panel. This enhances the overall strength and vibration resistance of the combined left (right) transmission housing and left (right) drive side wall panel, overcoming the shortcomings of existing cam-type jacquard machine frames in the domestic and international markets, where the drive side wall panels are generally single side wall panels with weak strength and vibration resistance. Indeed, this is an unexpected effect brought about by dual-side drive and dual-side reduction transmission. The interchangeability of the integrally formed left transmission housing and left drive side wall panel with the integrally formed right transmission housing and right drive side wall panel saves mold opening costs, thereby significantly reducing manufacturing costs.

[0008] The aforementioned left and right servo motors, left and right output gears, left and right camshafts, left and right reduction input gears, and left and right conjugate cams are all interchangeable. Because this drive and reduction device uses many common components, manufacturing, mold-making, and warehousing costs are significantly reduced, while assembly progress is improved and management costs are reduced, resulting in both cost advantages and market competitiveness.

[0009] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0010] After abandoning the existing single-sided centralized structure, this servo drive gear reduction device is improved to a distributed layout with the servo motor, cam transmission box and reduction meshing chain arranged on both sides, which has good dynamic balance and uniform vibration distribution on both sides of the jacquard machine body.

[0011] The driving force provided by the left and right servo motors configured on both sides is balanced. Combined with the configuration of the left and right camshafts on both sides, the double-end support of each shaft, and the fact that each shaft has only one conjugate cam, this significantly reduces the load on the bearings supported by the left and right camshafts compared to the existing single-sided camshaft configuration with double-end support, single input gear, and double conjugate cams on the same shaft. In particular, the transmission load distribution is balanced, effectively reducing the impact load on the left and right meshing gears during starting and braking and reducing gear wear. This device is highly targeted at heavy loads, especially variable loads, of large jacquard openings and conditions with large warp yarn changes. Attached Figure Description

[0012] Figure 1 This is a perspective view of the present invention assembled on a cam-shaped jacquard forming machine;

[0013] Figure 2 It is to be dismantled Figure 1 The front view of the left and right transmission housings and their respective covers;

[0014] Figure 3 yes Figure 2 Top view;

[0015] Figure 4 This is a 3D view after the right drive housing and its cover have been removed.

[0016] Figure 5 This is a 3D view after the left transmission housing and its cover have been removed.

[0017] Figure 6 yes Figure 2 The right view, and the right servo motor and right output gear have been removed;

[0018] Figure 7 It is a 3D view of the coaxially configured swing arm assembly;

[0019] Figure 8 yes Figure 7 The exploded diagram. Detailed Implementation

[0020] Please see Figures 1-8 As shown, this utility model provides a gear reduction device for a servo motor driven cam shed forming jacquard machine, including a left camshaft 4L, a left reduction input gear 6L and a left conjugate cam 7L respectively disposed on the left camshaft 4L, a left transmission box 3L and a left servo motor 2L arranged sequentially outside the left drive side wall plate 1L, and a right camshaft 4R, a right reduction input gear 6R and a right conjugate cam 7R respectively disposed on the right camshaft 4R, a right transmission box 3R and a right servo motor 2R arranged sequentially outside the right drive side wall plate 1R. The left transmission box 3L includes a left transmission box body 30L fixed to the left drive side wall plate 1L and a left box cover 31L fixed to the outer port of the left transmission box body 30L. The inner end of the left camshaft 4L is supported on the left drive side wall plate 1L. The right transmission box 3R includes a right transmission box body 30R fixed to the right drive side wall plate 1R and a right box cover 31R fixed to the outer port of the right transmission box body 30R. The right camshaft 4R has its inner end supported by the right drive side wall plate 1R and its outer end supported by the right box cover 31R. The left servo motor 2L is fixed to the left box cover 31L and its output shaft 21L, which extends into the left transmission box body 30L, is equipped with a left output gear 5L. The left output gear 5L meshes with the left reduction input gear 6L. The right servo motor 2R is fixed to the right box cover 31R and its output shaft 21R, which extends into the right transmission box body 30R, is equipped with a right output gear 5R. The right output gear 5R meshes with the right reduction input gear 6R.

[0021] The transmission structure employing left and right camshafts and corresponding left and right conjugate cams creates favorable conditions for reducing cantilever defects in the inner swing shaft, which is coaxially mounted on the outer swing shaft tube. The inner swing shaft can extend a similar distance beyond the relative drive side wall plate as the outer swing shaft tube, and the double-roller driven swing bracket mounted on the inner swing shaft can engage with the corresponding conjugate cam. Figure 8 The left-hand side double-roller driven pendulum frame is shown with only one roller visible, while the right-hand side double-roller driven pendulum frame is shown in its entirety (as it is not shown in the existing structure).

[0022] The left output gear 5L and the left reduction input gear 6L mesh on the same plane, as do the right output gear 5R and the right reduction input gear 6R. The left output gear 5L is positioned in front of or behind the left reduction input gear 6L (not shown), and correspondingly, the left servo motor 2L is fixed to the front outer wall of the left housing cover 31L (see Figure 1). Figure 1 , 4The right output gear 5R is located in front of or behind the right reduction input gear 6R (not shown), or on the rear outer wall (not shown). Correspondingly, the right servo motor 2R is fixed to the front outer wall of the right housing cover 31R (see [reference]). Figure 1 , 5 (or rear side outer wall (not shown)). The left transmission housing 30L and the left drive side wall panel 1L are integrally formed, and the right transmission housing 30R and the right drive side wall panel 1R are integrally formed. When the left output gear 5L and the right output gear 5R are symmetrically arranged, the integrally formed left transmission housing 30L, the left drive side wall panel 1L and the integrally formed right transmission housing 30R and the right drive side wall panel 1R are symmetrically arranged. When the left output gear 5L and the right output gear 5R are staggered, the integrally formed left transmission housing 30L, the left drive side wall panel 1L and the integrally formed right transmission housing 30R and the right drive side wall panel 1R are interchangeable.

[0023] The left servo motor 2L and the right servo motor, the left output gear 5L and the right output gear, the left camshaft 4L and the right camshaft 4R, the left reduction input gear 6L and the right reduction input gear 6R, and the left conjugate cam 7L and the right conjugate cam 7R are all interchangeable.

[0024] The left conjugate cam 7L has two eccentric discs symmetrically arranged on the left camshaft. Similarly, the right conjugate cam 7R also has two eccentric discs symmetrically arranged on the right camshaft. Under the continuous rotation of the left camshaft 4L and the right camshaft 4R, the left conjugate cam 7L and the right conjugate cam 7R drive the coaxially arranged inner swing shaft 82 and outer swing shaft tube 81 to swing synchronously in opposite directions through a driven swing frame (a known component) equipped with double rollers, or drive the separate and parallel swing shafts to swing synchronously in opposite directions. As for the coaxially arranged central swing shaft and the rocker arm mounted on it, and the concentric swing shaft tube and the rocker arm mounted on it, please refer to the jacquard opening device equipped with a knife-lifting guide mechanism (CN205205371U) applied for by the inventor on October 18, 2015. The knife-lifting mechanism, the knife-lifting guide mechanism, the vertical connecting rod for lifting, etc., use the technology of that patent and will not be described again here. However, Figure 3 As shown, the extension line of the rotation axis of the left camshaft 4L and the extension line of the rotation axis of the right camshaft 4R are on the same straight line X4, and this same straight line is parallel to the swing axis X82 of the inner swing shaft 82 and the swing axis X81 of the outer swing shaft tube 81, respectively. Figure 8 As shown.

[0025] This technical solution is applicable to cam jacquard looms where the rotation axes of the left and right camshafts, the swing axes of the coaxially arranged swing shafts, or the swing axes of the parallel-arranged split swing shafts are all aligned with the weft direction of the loom.

Claims

1. A pinion reduction gear for a cam-shuttle forming jacquard driven by a servomotor, characterized in that, The system includes a left servo motor, a left transmission box, a left camshaft, a left reduction input gear and a left conjugate cam respectively mounted on the left camshaft, and a right servo motor, a right transmission box, a right camshaft, a right reduction input gear and a right conjugate cam respectively mounted on the right camshaft. The left transmission box includes a left transmission box body fixed to the left drive side wall and a left box cover fixed to the outer port of the left transmission box body. The inner end of the left camshaft is supported on the left drive side wall and the outer end is supported on the left box cover. The right transmission box includes a right transmission box body fixed to the right drive side wall and a right box cover fixed to the outer port of the right transmission box body. The inner end of the right camshaft is supported on the right drive side wall and the outer end is supported on the right box cover. The left servo motor is fixed to the left box cover and its output shaft, which extends into the left transmission box body, is equipped with a left output gear that meshes with the left reduction input gear. The right servo motor is fixed to the right box cover and its output shaft, which extends into the right transmission box body, is equipped with a right output gear that meshes with the right reduction input gear.

2. The pin gear reduction drive for a cam-shuttle-latch jacquard of a servomotor according to claim 1, characterized in that, The left output gear is arranged in front of or behind the left reduction input gear, and the right output gear is arranged in front of or behind the right reduction input gear.

3. The pin gear reduction drive for a servomotor-driven cam-shuttle shed forming jacquard machine according to claim 2, characterized in that The left transmission housing and the left drive side wall panel are integrally formed, and the right transmission housing and the right drive side wall panel are integrally formed. When the left output gear and the right output gear are symmetrically arranged, the integrally formed left transmission housing and the left drive side wall panel are symmetrically arranged with the integrally formed right transmission housing and the right drive side wall panel. When the left output gear and the right output gear are staggered, the integrally formed left transmission housing and the left drive side wall panel are interchangeable with the integrally formed right transmission housing and the right drive side wall panel.

4. The gear reduction arrangement for a servomotor-driven cam-shuttle-formation jacquard machine according to claim 1, characterized in that The left and right servo motors, left and right output gears, left and right camshafts, left and right reduction input gears, and left and right conjugate cams are all interchangeable.

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